Download or read book Estimation of a Vehicular Carbon Monoxide Modal Emissions Model and Assessment of an Intelligent Transportation Technology written by Simon Washington and published by . This book was released on 1994 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statistical Anaysis and Modeling of Automotive Emissions written by Timothy C. Coburn and published by DIANE Publishing. This book was released on 2001-04 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains many of the papers presented in a mini-symposium on statistical analysis & modeling of automotive emissions held in Aug. 1999. The articles represent the efforts of approximately 20 authors & co-authors from across industry, gov't., & academia & cover a diverse array of topics regarding fundamental methodological issues, advanced statistical techniques, & specific case studies. Two papers included in the mini-symposium involved the assessment of sulfur in diesel fuel on the performance of emissions control devices & the forecasting of ozone standard exceedances that occur partly in response to vehicular traffic vol. & dispersion.
Download or read book Journal of Transportation and Statistics written by and published by . This book was released on 2000 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Mobile Source Emissions written by National Research Council and published by National Academies Press. This book was released on 2000-07-14 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mobile Source Emissions Factor (MOBILE) model is a computer model developed by the U.S. Environmental Protection Agency (EPA) for estimating emissions from on-road motor vehicles. MOBILE is used in air-quality planning and regulation for estimating emissions of carbon monoxide (CO), volatile organic compounds (VOCs), and nitrogen oxides (NOx) and for predicting the effects of emissions-reduction programs. Because of its important role in air-quality management, the accuracy of MOBILE is critical. Possible consequences of inaccurately characterizing motor-vehicle emissions include the implementation of insufficient controls that endanger the environment and public health or the implementation of ineffective policies that impose excessive control costs. Billions of dollars per year in transportation funding are linked to air-quality attainment plans, which rely on estimates of mobile-source emissions. Transportation infrastructure decisions are also affected by emissions estimates from MOBILE. In response to a request from Congress, the National Research Council established the Committee to Review EPA's Mobile Source Emissions Factor (MOBILE) Model in October 1998. The committee was charged to evaluate MOBILE and to develop recommendations for improving the model.
Download or read book Modal Emissions Modeling with Real Traffic Data written by Jason A. Crawford and published by . This book was released on 1999 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report details the use of a modal emissions model to estimate the relative emissions of CO due to changes in vehicle operating characteristics on urban roadways. The Davis Institute for Transportation Studies Emissions Model (DITSEM) was selected to demonstrate the emissions characteristics of different freeway operating conditions. Instrumented vehicle data collected in Houston, Texas provides a set of operating parameters for which CO emissions are estimated. These estimates are calculated for different times of the day on the same facility to determine the relative emissions levels from a representative vehicle traveling on the freeway. The research team examined 10 samples along three roadways (two freeways, and one arterial). Implausible results were found in data exhibiting high average speeds (>60 mph) where average emissions rates were higher than those on the same roadway under congested conditions. This led to several conclusions of which the most important was that the DITSEM model not be used with samples where the percent of the driving cycle greater than 60 mph 2/sec exceeds 9%. This limit represents the highest value from which the model was derived for this variable. In addition, it is noted that the speed instrumentation was not able to provide sufficient precision for meaningful analysis with the available data.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1995 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessing the Emissions and Fuel Consumption Impacts of Intelligent Transportation Systems written by and published by . This book was released on 1998 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Emission estimation based on traffic models and measurements written by Nikolaos Tsanakas and published by Linköping University Electronic Press. This book was released on 2019-04-24 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traffic congestion increases travel times, but also results in higher energy usage and vehicular emissions. To evaluate the impact of traffic emissions on environment and human health, the accurate estimation of their rates and location is required. Traffic emission models can be used for estimating emissions, providing emission factors in grams per vehicle and kilometre. Emission factors are defined for specific traffic situations, and traffic data is necessary in order to determine these traffic situations along a traffic network. The required traffic data, which consists of average speed and flow, can be obtained either from traffic models or sensor measurements. In large urban areas, the collection of cross-sectional data from stationary sensors is a costefficient method of deriving traffic data for emission modelling. However, the traditional approaches of extrapolating this data in time and space may not accurately capture the variations of the traffic variables when congestion is high, affecting the emission estimation. Static transportation planning models, commonly used for the evaluation of infrastructure investments and policy changes, constitute an alternative efficient method of estimating the traffic data. Nevertheless, their static nature may result in an inaccurate estimation of dynamic traffic variables, such as the location of congestion, having a direct impact on emission estimation. Congestion is strongly correlated with increased emission rates, and since emissions have location specific effects, the location of congestion becomes a crucial aspect. Therefore, the derivation of traffic data for emission modelling usually relies on the simplified, traditional approaches. The aim of this thesis is to identify, quantify and finally reduce the potential errors that these traditional approaches introduce in an emission estimation analysis. According to our main findings, traditional approaches may be sufficient for analysing pollutants with global effects such as CO2, or for large-scale emission modelling applications such as emission inventories. However, for more temporally and spatially sensitive applications, such as dispersion and exposure modelling, a more detailed approach is needed. In case of cross-sectional measurements, we suggest and evaluate the use of a more detailed, but computationally more expensive, data extrapolation approach. Additionally, considering the inabilities of static models, we propose and evaluate the post-processing of their results, by applying quasi-dynamic network loading.
Download or read book Access written by and published by . This book was released on 2003 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vehicular Social Networks written by Anna Maria Vegni and published by CRC Press. This book was released on 2017-03-31 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a comprehensive guide to vehicular social networks. The book focuses on a new class of mobile ad hoc networks that exploits social aspects applied to vehicular environments. Selected topics are related to social networking techniques, social-based routing techniques applied to vehicular networks, data dissemination in VSNs, architectures for VSNs, and novel trends and challenges in VSNs. It provides significant technical and practical insights in different aspects from a basic background on social networking, the inter-related technologies and applications to vehicular ad-hoc networks, the technical challenges, implementation and future trends.
Download or read book Predicting Air Quality Effects of Traffic flow Improvements written by Richard Gerhard Dowling and published by Transportation Research Board. This book was released on 2005 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Emissions Management Using ITS Technology written by Keith Jasper and published by . This book was released on 1998 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Emissions Management Using ITS Technology report summarizes and interprets the results of three Intelligent Transportation Systems (ITS) Field Operational Tests (FOTs) that evaluated the use of emerging technologies to help authorities measure emissions and develop strategies to help control them. Two of these tests use similar technologies employing a remote infrared sensing device to analyze the carbon monoxide content of the exhaust of a vehicle. The other test used Light Detection and Ranging (a technology similar to radar) to measure the amount and character of pollution in the air. The FOTs considered in this report are: LIDAR, TDM/ED and RTED. Institutional issues were not significant in these tests. The report findings are organized in the categories of impact, user response, technical lessons learned, institutional challenges and resolutions, and cost to implement. This report highlights the successes and problems these tests encountered while attempting to develop the technologies appropriate to measuring and reacting to vehicle emissions"--Technical report documentation page.
Download or read book Technology Assessment of Changes in the Future Use and Characteristics of the Automobile Transportation System Summary and findings written by United States. Congress. Office of Technology Assessment and published by . This book was released on 1979 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Emissions and Fuel Consumption Impacts of Intelligent Transportation Systems written by Sergio J. Ostria and published by . This book was released on 1998 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 2000 IEEE Intelligent Transportation Systems Conference Proceedings written by IEEE Electron Devices Society and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 2000 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text on intelligent transportation systems covers topics such as sensors, communications, simulation, man-machine interfaces, control, decision systems, information systems, computers, reliability and quality assurance, and navigation and guidance systems.
Download or read book Emerging Research in Intelligent Systems written by Gonzalo Fernando Olmedo Cifuentes and published by Springer Nature. This book was released on with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cost Effectiveness of Transportation Control Strategies for Carbon Monoxide written by Jay E. Norco and published by . This book was released on 1974 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
